Question: Name the Class IB flammable liquid with maximum combustion enthalpy?
Paraphrase: Title the Course IB combustible fluid with greatest combustion enthalpy?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q21009055 . ?ent wdt:P2117 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: methanol, Ethanol, toluene, Octane